Kenwood TK-3170 Service Manual page 62

U
TK-3170/3173
TX-RX UNIT (X57-7000-XX) (B/4)
OPTDET
DACCLK
RXD
TXD
DACLD
PTT
AM2 5MS
DACDAT
EXTLIMIN
TX
AF SW
SPLO
Q21
RN4910(F)
FILTERO
DTRLOAD
AFSTD
TCLK/DTRDO
AFDAT
AFDIO
AFRTM
SCLK
AFDIR
R241 47k
R244 47k
Q31
2SC4649(N,P)
R239
100k
Q31,32
AUDIO PROCESSOR
CLOCK SHIFT SW
VOX LEVEL
TECTOR
CONTROL SW
Q19
SSM3K15TE(F)
VOXMUTE
OPST
MMUTE
AQSFT
SP_M
POWER ON:5V
7.5V
OFF:0V
5MS
SB
5R
5C
5T
60
X57-701 (B/4) 5/6
V
SCHEMATIC DIAGRAM
C118 0.1u
C99 4.7u
C100 4.7u
0.01u
C102
4.7u
C103
10
TCLK/DTRDO
11
TDATA/DTRCLK
12
DI/O IC13
13
AQUA-L
RDF/FD
14
AUDIO PROCESSOR
SCLK
15
DIR
R131 16
X2
XOUT
L77-1976-05
0
3.6864MHz
R132
0
Q32
2SC4649(N,P)
VOX AMP
GAIN LIMITER
D32
DA221
R236
VOX LEVEL
120k
DETECTOR
68p
D29 C112
C108
1M
R146
1u
RB706F-40
W
R165
R156
300k
150k
R157
300k
A
L13
32
AGND
31
RXIN
30
RXINO
29
FILTERO
28
EXPOUT
27
RXAFIN
26 C126
RXAF
47p
R158
330k
R163
39k
C106
R145
150k
470p
Q22
SSM3K15TE(F)
AF MUTE SW
R150 C125
15k 0.1u
C121
R151
18k
0.039u
X Y
OPTDET
RXD
TXD
PTT
C134
0.047u
C131
820p
R161 120k
120k
R162
C120 2.2u
R111 820k
R112 330k
R169
22k
R160 R247
180k
220k
Q34
SSM3K15TE(F)
EXT. ALERT MIC
INPUT ATT SW MUTE
SW
Q30
2SJ243
C183
470p
OPST
MMUTE
DACCLK
DACLD
5MS
DACDAT
RXD
PTT
OPTDET
TXD
SP_M
SB
5R
5C
5T